Orbitron

Defend your Orbit by building up an impenetrable stronghold and hold back the enemy waves!
Inspired by Space Invaders and Tetris, Orbitron is a mix between a shooter and a defense game. Prove your shooting and defense building skills in 34 challenging levels!
Tips:
Focus on staying alive rather than chasing down every enemy; Your Orbit has 40 lives and can be easily repaired, while you only got 3.
Only killing will earn you money; so don’t just build walls and let the enemies collide, you will soon run out of money.
Build strategically; build non-permeable walls under your turrets, if you’re afraid of shooting them. Also, an Amplifier above a Turret is also a good idea.
[Update 23.10.07] – fixed the bug at the end of game
[Update 24.10.07] – improved performance
Move: Move Mouse;
Shoot: Left Mouse;
EMP: SPACE;
Pause: P;
Mute: M;
Rotate building: SPACE;
Play the tutorial for more information!